Upper control arm bushes

Here is a picture of a typical upper control arm. I've tried to make a yellow marking to show the distance I'm talking about from how the bushing is pressed in compared to the flange on the bushing. I hope you can make it out.

Is this supposed to be flush with the control arm (the flange on the bushing)? In other words pressed in all the way? If not, then how do you know when you have pressed the bushing in the right amount as the new bushing (pictured under the arm) has no line or marks that I could see to tell you where you should stop.

Hope these pics work!!!